Page is a not externally linkable
milanmk - 2:51 pm on Jun 18, 2007 (gmt 0)
RedirectPermanent /old-sub-cat/ http://example.com/cat/new-sub-cat/ Well you were quite close in your RedirectMatch RedirectMatch /old-sub-cat/article-(*).shtml http://example.com/cat/new-sub-cat/article-$.sthml Milan
If you are moving the whole directory then a simple redirect will do the work.